Current Conditions
More Information
WeatherCity Home
Switch to Metric Units
[ Almanac ]  
Sunrise:  5:40 am
Sunset:  8:22 pm
[ Moon Phases ]  

First Quarter
Jul 22

Full Moon
Jul 29

Last Quarter
Aug 6

New Moon
Aug 13




July 18th, 2026 :: 1:09 pm CDT   

Local Weather Report for
Decatur
Illinois, United States

 Current Decatur Weather Conditions Updated July 18th at 11:54 am 
Overcast
Temperature:88°F Dew Point:73°F
Barometer:29.98 inHg Wind:N 21 Mph
Humidity:62.5% Visibility:0M
 
 Decatur Weather Forecast Summary  
 
Today
Jul 18th
Sunday
Jul 19th
Monday
Jul 20th
Tuesday
Jul 21st
Wednesday
Jul 22nd
Sunny Sunny Mostly Sunny Thundershowers Mostly Sunny
86°F
80°F
64°F
84°F
65°F
85°F
69°F
74°F
61°F
 
 Decatur Detailed Weather Forecast  
 
Saturday, July 18th, 2026
Afternoon Temperature: 86°F
Sunny. Chance of a thunderstorm. Windy at times.
Evening Temperature: 78°F
Clear with a chance of showers or thundershowers.
Sunday, July 19th, 2026
Overnight Temperature: 68°F
Clear with a slight chance of showers.
Morning Temperature: 70°F
Sunny.
Afternoon Temperature: 80°F
Sunny.
Evening Temperature: 73°F
Clear. Slight chance of a thunderstorm.
Monday, July 20th, 2026
Overnight Temperature: 66°F
Mostly clear.
Morning Temperature: 70°F
Sunny with cloudy periods.
Afternoon Temperature: 83°F
A mix of sun and cloud. Chance of a thunderstorm.
Evening Temperature: 78°F
A mix of cloudy and clear skies with a chance of showers or thundershowers.
Tuesday, July 21st, 2026
Overnight Temperature: 73°F
A mix of cloudy and clear skies with showers likely. Chance of a thunderstorm.
Morning Temperature: 78°F
Sunny with a slight chance of showers or thundershowers. Windy at times.
Afternoon Temperature: 83°F
Sunny. Chance of a thunderstorm. Windy at times.
Evening Temperature: 73°F
Clear. Slight chance of a thunderstorm. Windy at times.
Wednesday, July 22nd, 2026
Overnight Temperature: 65°F
Clear.
Morning Temperature: 68°F
Sunny.
Afternoon Temperature: 73°F
A mix of sun and cloud. Windy at times.
Evening Temperature: 65°F
Mostly clear.
Thursday, July 23rd, 2026
Overnight Temperature: 56°F
Clear.
Morning Temperature: 63°F
Sunny.
Afternoon Temperature: 74°F
Sunny.
Evening Temperature: 68°F
Mostly clear.
Friday, July 24th, 2026
Overnight Temperature: 60°F
Mostly clear.
Morning Temperature: 62°F
Mostly sunny. Windy at times.
Afternoon Temperature: 65°F
Cloudy.
Evening Temperature: 60°F
Cloudy with a few showers. Windy at times.
Saturday, July 25th, 2026
Overnight Temperature: 60°F
A mix of cloudy and clear skies with showers likely. Windy at times.
Morning Temperature: 63°F
A mix of cloud and sun. Windy at times.
Afternoon Temperature: 76°F
A mix of cloud and sun. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 72°F
Clear with cloudy periods.
Sunday, July 26th, 2026
Overnight Temperature: 71°F
Mostly clear.
Morning Temperature: 76°F
Mostly sunny. Chance of a thunderstorm.
Afternoon Temperature: 86°F
Sunny with cloudy periods. Chance of a thunderstorm.
Evening Temperature: 82°F
Clear with cloudy periods. Chance of a thunderstorm.





 

  [ Local Weather Report ]
Monticello, IL 
 
Sullivan, IL 
 
Clinton, IL 
 
Shelbyville, IL 
 
Tuscola, IL 
 
Taylorville, IL 
 
Pana, IL 
 
Champaign, IL 
11:53 AM  88°F
 
 
Lincoln, IL 
 
Urbana, IL 
11:53 AM  88°F
 

 
This WeatherCity Weather Forecast for Decatur, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

  Decatur weather brought to you by WeatherCity Server: us-chi1   Rendered in 0.00301s  
Home   |   About WeatherCity